20-54048330-G-A

Variant names:

• chr20-54048330-G-A
• rs290422
• NM_001366298.2:c.142+9755C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_001366298.2(BCAS1):​c.142+9755C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.144 in 152,044 control chromosomes in the GnomAD database, including 1,938 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.14 (1938 hom., cov: 32)
• Consequence: BCAS1 NM_001366298.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.796
• Publications: 1 publications found

Genes affected

BCAS1 (HGNC:974): (brain enriched myelin associated protein 1) This gene resides in a region at 20q13 which is amplified in a variety of tumor types and associated with more aggressive tumor phenotypes. Among the genes identified from this region, it was found to be highly expressed in three amplified breast cancer cell lines and in one breast tumor without amplification at 20q13.2. However, this gene is not in the common region of maximal amplification and its expression was not detected in the breast cancer cell line MCF7, in which this region is highly amplified. Although not consistently expressed, this gene is a candidate oncogene. [provided by RefSeq, Apr 2016]

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.99).
• BA1: GnomAd4 highest subpopulation (SAS) allele frequency at 95% confidence interval = 0.239 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001366298.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BCAS1	NM_001366298.2	MANE Select	c.142+9755C>T		intron	N/A	NP_001353227.1
	BCAS1	NM_003657.4		c.142+9755C>T		intron	N/A	NP_003648.2
	BCAS1	NM_001366295.2		c.142+9755C>T		intron	N/A	NP_001353224.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BCAS1	ENST00000688948.1	MANE Select	c.142+9755C>T		intron	N/A	ENSP00000508731.1
	BCAS1	ENST00000395961.7	TSL:1	c.142+9755C>T		intron	N/A	ENSP00000379290.3
	BCAS1	ENST00000371435.6	TSL:1	c.142+9755C>T		intron	N/A	ENSP00000360490.2

Frequencies

GnomAD3 genomes AF: 0.144 AC: 21900 AN: 151926 Hom.: 1941 Cov.: 32

Gnomad AFR AF: 0.0467

Gnomad AMI AF: 0.207

Gnomad AMR AF: 0.127

Gnomad ASJ AF: 0.255

Gnomad EAS AF: 0.109

Gnomad SAS AF: 0.251

Gnomad FIN AF: 0.157

Gnomad MID AF: 0.209

Gnomad NFE AF: 0.193

Gnomad OTH AF: 0.151

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.144 AC: 21896 AN: 152044 Hom.: 1938 Cov.: 32 AF XY: 0.145 AC XY: 10748 AN XY: 74314

African (AFR) AF: 0.0466 AC: 1932 AN: 41478

American (AMR) AF: 0.128 AC: 1949 AN: 15278

Ashkenazi Jewish (ASJ) AF: 0.255 AC: 884 AN: 3468

East Asian (EAS) AF: 0.109 AC: 562 AN: 5166

South Asian (SAS) AF: 0.250 AC: 1205 AN: 4814

European-Finnish (FIN) AF: 0.157 AC: 1657 AN: 10546

Middle Eastern (MID) AF: 0.224 AC: 66 AN: 294

European-Non Finnish (NFE) AF: 0.193 AC: 13138 AN: 67980

Other (OTH) AF: 0.149 AC: 314 AN: 2108

Alfa AF: 0.180 Hom.: 4275

Bravo AF: 0.134

Asia WGS AF: 0.135 AC: 469 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.99
CADD	Benign	1.5
DANN	Benign	0.39
PhyloP100		-0.80
Mutation Taster		=100/0	polymorphism (auto)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs290422; hg19: chr20-52664869;